Date   

Re: "Supercharged" Radiwow R-108 Transoceanic DXing Performance

Paul Blundell
 

They do look good like that. 

--
Paul - Moderator
UltralightDX


"Supercharged" Radiwow R-108 Transoceanic DXing Performance

Gary DeBock
 

 Although the new Radiwow R-108 seems to be a quality control nightmare from the warranty-shirking manufacturer, if you are lucky enough to purchase a decent unit on eBay (or of you happen to have Navy electronics training to repair a wacky model), the radio actually works quite well once all the bugs have been banished. For a grand total of around $95 US, you can have a "Supercharged" travel portable that is lightweight, compact, and about half the price of a similarly modified Skywave SSB (such as in this side-by-side photo of these suspiciously similar Shenzhen, China siblings, with exactly the same height, length and thickness). Nobody ever said that the Chinese reverse engineers didn't have a sense of humor! (this photo is also posted at the below link, after Groups.io deletes it :-)  https://dreamcrafts.box.com/s/ya3pwjeclw7j80ll36a8pskgr3wwsbwn

                                                                                                               

This early morning I had the chance to try out the "Supercharged" R-108 in the reception of the South Korean big gun 972-HLCA, which was at an S9 level on the modified portable about 2 hours before local sunrise here (shown in the photo below, which is also posted at   https://dreamcrafts.box.com/s/wxz42ts3kljnui7ltrhppx076id06m05
In comparison to the Skywave SSB the Chinese-made economy model has a pretty wimpy audio amp, but a DXer can work around this by boosting up the audio gain on his digital recorder (and/ or audio processing software). With a little practice a DXer can have a lot of transoceanic DXing fun with this tiny, compact portable-- but only after all the reverse-engineering bugs have been worked out!

972  HLCA   Dangjin, S. Korea,  1500 kW   Piano musical theme and female speech at temporary S9 level at 1151 UTC (Stand-alone 7.5" loopstick Radiwow R-108)  https://dreamcrafts.box.com/s/huxz3iivyr6itysvjtze48mmoo0wshk9

                                                                                                             
 


Re: Radiwow R-108 Quality Control (or Lack Thereof)

Michael.2E0IHW
 

On Samstag.16.03.19 02:24, Rik wrote:
Thanks for the warning! I was afraid of that sort of thing. -FARMERIK
................

ditto!
Michael UK

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Re: Radiwow R-108 Quality Control (or Lack Thereof)

Gary DeBock
 

<<<   Maybe some feedback should be sent to the Chinese engineers so they can maybe sort these issues out. C Crane Skywave had similar problems with their first production run with whine and other issues. It wasn't long ago Radiwow were offering half price and discounted radios for unbiased reviews.   >>>

Thanks Chris,

So far three of the R-108 models have been received here, but several more have been ordered for an extensive quality control check.

Besides reporting all of the detailed R-108 quirks to this group I do plan to send a full report to Radiwow eventually, after all of the models have been thoroughly assessed. So far none of the three models was trouble-free out of the box, so this fact in combination with the lack of any warranty is pretty disastrous for a model's reputation. I don't plan to ask Radiwow for any troubleshooting on the defective models, since Navy-trained techs like Steve R. and I could probably fix them quicker than the Chinese reverse engineers, especially when no warranty is involved :-)

73, Gary

   

 


Re: Radiwow R-108 Quality Control (or Lack Thereof)

Chris Rogers
 

Maybe some feedback should be sent to the Chinese engineers so they can maybe sort these issues out. C Crane Skywave had similar problems with their first production run with whine and other issues. It wasn't long ago Radiwow were offering half price and discounted radios for unbiased reviews.


Re: Radiwow R-108 Quality Control (or Lack Thereof)

Rik
 

Thanks for the warning! I was afraid of that sort of thing. -FARMERIK


Radiwow R-108 Quality Control (or Lack Thereof)

Gary DeBock
 

The Radiwow R-108 is a new, very compact Chinese-made AM-FM-LW-SW-AIR Ultralight radio which has recently become available to North American purchasers on eBay (such as this listing at $49.98, including free shipping  https://www.ebay.com/itm/RADIWOW-R-108-Radio-Digital-AM-FM-Portable-Stereo-LW-SW-AIR-DSP-World-Receiver/173793532305?hash=item2876e6d991:g:esMAAOSw1YRcZTng:rk:1:pf:0

     When my first R-108 model arrived a couple weeks ago it had an intermittent issue with loud oscillations on the high end of the AM band, but somehow that problem was completely corrected as the result of a 7.5 inch loopstick transplant. Since there were no more digital issues with my first (and only) R-108 model I was cautiously optimistic that the Chinese company was paying serious attention to quality control. Wrong!

     Today I received two more R-108 models (ordered from the listing above), and both of them have a "motorboating" sound when the volume control is increased. In one model this is pretty loud, while in the other model it is of moderate strength. This "motorboating" is not related to a weak battery (as was the case in old pocket transistor radios). The radio with the loud "motorboating" volume control also has continuous, internally-generated oscillations on the high band frequency of 1650 kHz, which is a relatively open frequency during the daytime here. Since Radiwow does not offer any kind of manufacturer's warranty on their radios, these quality control issues are a deal breaker, in my opinion. Because some other R-108 purchasers may be encountering these same type of issues I may try to troubleshoot the radios on my own rather than sending them back to China, but in order to avoid receiving a defective radio without any manufacturer's warranty I would strongly recommend that purchasers avoid this Radiwow R-108 model.

 

Gary DeBock (in Puyallup, WA, USA)


Re: Radiwow R-108 and XHDATA D-808 Loopsticks

Max Italy
 

Time ago somedoby said that he wouldn't trust a site .co when i suggested to upload images at https://pasteboard.co/

It seems that it is the domain .io not to be trusted :)

Another alternative is https://imgur.com/upload
more images can be uploaded and shown in a page linked in the post, or just single images shown directly in the post.


Re: Radiwow R-108 and XHDATA D-808 Loopsticks

Michael.2E0IHW
 

Good idea, Gary.
Please also post links in each and every posting here.
I often can't find pages sought.
Maybe 'hoo wasn't so bad after all...
An independent album on a free website would
seem to be indicated!

Michael UK

On Donnerstag.14.03.19 22:41, Gary DeBock via Groups.Io wrote:
Hi Guys,

Sorry about the Groups.io software deleting the photos in my posts.

Even for me, my photos usually only stay visible in the posts for about
18 hours, them Groups.io deletes them. The solution would be to upload
all of the photos in an album on our related Ultralight Experimenters
site (since there is no more file or photo album storage space on this
group's site). I've already done this for the 7.5 inch loopstick
transplant procedure on the new Radiwow R-108, but as time allows I'll
try to do it for all the other photos as well.

73, Gary DeBock (in Puyallup, WA, USA)
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Re: Radiwow R-108 and XHDATA D-808 Loopsticks

Gary DeBock
 

Hi Guys,

Sorry about the Groups.io software deleting the photos in my posts.

Even for me, my photos usually only stay visible in the posts for about 18 hours, them Groups.io deletes them. The solution would be to upload all of the photos in an album on our related Ultralight Experimenters site (since there is no more file or photo album storage space on this group's site). I've already done this for the 7.5 inch loopstick transplant procedure on the new Radiwow R-108, but as time allows I'll try to do it for all the other photos as well.

73, Gary DeBock (in Puyallup, WA, USA)


Re: Radiwow R-108 and XHDATA D-808 Loopsticks (photos not shown)

Steve Ratzlaff
 

Yes, lately none of the photos have shown up in my emails either, just the icons where a photo should be. Probably some sort of groups.io thing, hopefully it will get sorted out soon.

Steve

On 3/14/2019 9:15 AM, Gord Seifert wrote:

    Can anyone else see the photo in Gary's post? I have seen a couple of other posts lately, in which a photo was supposed to be included, where I could not actually see the photo, just a small icon that seems to indicate a broken photo.

 Regards,
 Gord


Re: Radiwow R-108 and XHDATA D-808 Loopsticks

D R
 

Hi Gord,

I can see the photo in the post made at 10.44 yesterday, but the previous two which had inline photos just had blank frames where they should have been.



I've attached the photo it and tried to include it as an online image here - let's see what happens ....

Regards,
Dave


On Thursday, 14 March 2019, 16:15:13 GMT, Gord Seifert <gks61711@...> wrote:



    Can anyone else see the photo in Gary's post? I have seen a couple of other posts lately, in which a photo was supposed to be included, where I could not actually see the photo, just a small icon that seems to indicate a broken photo.

 Regards, 
 Gord 


Re: Radiwow R-108 and XHDATA D-808 Loopsticks

Gord Seifert
 


    Can anyone else see the photo in Gary's post? I have seen a couple of other posts lately, in which a photo was supposed to be included, where I could not actually see the photo, just a small icon that seems to indicate a broken photo.

 Regards, 
 Gord 


Re: Radiwow R-108 and XHDATA D-808 Loopsticks

Rik
 

Gary- Would it be possible to get your articles and photos linked to from the files section here? - FARMERIK


Ultralight DX Group.........

robert ross
 

Hello Terry:


   Thanks for your interest in our Ultralight DX Group. The YAHOO Group is now inactive and not being used since we transferred the group to…..




If you go to the groups.io website you can join the group there and we would be happy to have you in the group.

Yahoo groups has been having lots of problems for quite some time now, so we were forced to transfer everything over to groups.io where things run quite smoothly.

We wanted to Cancel the old YAHOO Group….but the previous owner passed away quite some time ago, and he held the Ownership of the Group, and the remaining Moderators (Myself included) were unable to erase the Old Group.

You’ll find all the Old Members from the YAHOO Group on the New groups.io Group.

73…ROB VA3SW

Robert Ross
London, Ontario CANADA

UltralightDX Group Moderator




************************************************************
TERRY WILLIAMS Wrote………...


Hello,

The following person would like to join the ultralightdx group:
Email address: lovedutchbicycles <terry@...>

Comment from user:
Hi, I heard about this group on SWLing.com. I'm a radio enthusiast and also a ham in Canada (VE3YHF). Thanks!


*************************************************************



Re: Radiwow R-108 and XHDATA D-808 Loopsticks

Rémy Friess
 


Le 13/03/2019 11:44, Gary DeBock via Groups.Io a écrit :

Of course in comparison to the SSB circuitry in communication receivers (or even in the Sony ICF-2010/ 2001D or Tecsun PL-880), the SSB function of both the CC Skywave and the D-808 is pretty rudimentary.

I didn't really mean the ICF-2001D. I have an old ICF-SW1000T that is excellent in SSB and hardly larger than the D-808, and it also has an excellent synchronous detector.

As to the Tecsun PL-880, the one I have is very poor in SSB. I guess it's a matter of quality control, which is catastrophic with Chinese manufacturers.

Regards,

Rémy.,_


Re: Radiwow R-108 and XHDATA D-808 Loopsticks

Gary DeBock
 

Michael,

I think that those links were posted in more than one message.

The Radiwow R-108 disassembly links are posted below  

RF Circuit Board  https://dreamcrafts.box.com/s/456oocxphu0uytkz8i9trfdhb06750i3

Cabinet Disassembly (Digital and RF Circuit Boards)  https://dreamcrafts.box.com/s/xxhqja4031uo16j1rma41xk0t84ujm0p

Lithium-ion Rechargeable Battery  https://dreamcrafts.box.com/s/zn97mtiathscw54qn5i8tdfs4jesem8d

CC Skywave SSB and R-108... the identical sized Shenzhen "siblings"  https://dreamcrafts.box.com/s/jvenlc0mg6a8lqktld6ouyna3fjzbhaw

The R-108 7.5" loopstick transplant links are posted below

Finished model with stock and enhanced loopsticks  https://dreamcrafts.box.com/s/o115x36ipt8itob81yofwpv8yaamcrou

Finished model-- Mug Shot   https://dreamcrafts.box.com/s/20zk1eyp3el94o8znvlbolk6cp4quyrq

RF Circuit Board soldering procedure  https://dreamcrafts.box.com/s/ap4cv77p9kvc8l86xzg3deymnktf8yc5

Litz Wire Routing System  https://dreamcrafts.box.com/s/y23snut7dokolluq5rvx9kkbv4f7jc2e

73, Gary


Re: Radiwow R-108 and XHDATA D-808 Loopsticks

Gary DeBock
 

Thanks Remy,

<<<   I have never used or even seen a C.Crane radio but still, if the D-808 is a copy of the C.Crane and judging from it, “technical innovations” doesn't seem to mean improvement. I find the D-808 rather poor on SSB, especially when used in ECSSB mode, compared to its performance in AM, and compared to other receivers, like the SONYs for instance or the Tecsun PL-660.   >>>

Of course in comparison to the SSB circuitry in communication receivers (or even in the Sony ICF-2010/ 2001D or Tecsun PL-880), the SSB function of both the CC Skywave and the D-808 is pretty rudimentary. The challenge for C.Crane was to develop some type of SSB capability that would fit inside the very compact Skywave cabinet space (122mm x 75mm x 27mm), in addition to the RF and Digital circuit boards , speaker and other components. The C.Crane company was obviously quite proud of its achievement in developing the Skywave SSB model (shown in the photo below, next to the D-808), and started marketing the ultra-compact SSB-enhanced portable for $169.98 in the summer of last year. The sky-high price was probably an attempt to cover their research and development costs, but it was a very bad idea for a radio assembled in China, with a copy cat company in the same city eager to "appropriate" the technology.

73, Gary

                                                  


Re: Radiwow R-108 and XHDATA D-808 Loopsticks

Rémy Friess
 

Hi Chris,

Le 12/03/2019 22:36, Chris Black a écrit :

Regarding SSB, when I first clicked the button, it showed LSB.
Not sure how I did it but now it only shows USB?
In the earlier days of the internet, one would have answered "RTFM"... ;)

You did it by pressing the appropriate button, the "Info" button.

This information is even printed on the set itself, in small dark red characters on a brown background. You need a good looking-glass to read it.

Well, the logic in that receiver is a bit strange, to say the least. To change from one sideband to the other you don't press the "SSB" button but the "Info" button.

When you get to +99 you get a pronounced HET.
Continuing to move the wheel up begins to decrement
the numbers with the typical BFO/zero beat sound until
you gat back to the starting point.
Any enlightening on how this thing thinks is most appreciated.
Strictly speaking it doesn't "decrement" the numbers, it jumps back to -99 and continues to increment them till it reaches +99 again.

Conversely, if you turn the wheel downwards, it decrements from +99 to -99, then starts again at +99.

Strangely enough in AM mode it tunes in 1 kHz steps and never jumps back. Therefore I always leave the main tuning knob in fast mode and use the thumbwheel for the slow mode.

All in all the D-808 is a rather good receiver, but it takes some getting used to.

To key-in 6070 kHz for instance, you have two options. Either "Freq-6-0-7-0-Freq", or "Freq-0-6-0-7-0". But on the MW band you don't have to key in the leading 0 or press "Freq" twice. Very strange...

Regards,

Rémy.


Re: Radiwow R-108 and XHDATA D-808 Loopsticks

Rémy Friess
 


> Remy, I'm not sure that you understood the original post. 
> There are no technical innovations in the D-808 model.
>
> These were all in the development of C.Crane's Skywave SSB model, [...]

OK. Thanks for the clarification.

I have never used or even seen a C.Crane radio but still, if the D-808 is a copy of the C.Crane and judging from it, “technical innovations” doesn't seem to mean improvement. I find the D-808 rather poor on SSB, especially when used in ECSSB mode, compared to its performance in AM, and compared to other receivers, like the SONYs for instance or the Tecsun PL-660.

But mine is an early model, maybe they have improved since.

73, Rémy.

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